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Irrigated Lands Regulatory Program (ILRP)

The ILRP was initiated to prevent agricultural runoff from impairing surface waters, and later included the addition of groundwater regulations. Runoff from irrigated crop lands can contain pollutants, such as pesticides, fertilizers, salts, and sediment, which can harm aquatic life or make water unusable for human consumption. It is a program that issues permits – Waste Discharge Requirements (WDRs) - and conducts compliance activities, to ensure growers adhere to Central Valley Water Board regulations. WDRs address irrigated agricultural discharges to protect water quality.

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Stakeholder Meetings – Next Meeting – 2027, to be announced

Public Comment Requests

The Central Valley Water Board invites the public and other stakeholders to submit written comments on the submission(s) below. Comments may be submitted to the identified ILRP contact by the deadline provided for each submittal. Please contact the identified ILRP staff member to request a copy of the submittal(s).

Growers in the Grassland Drainage Area – Amending Waste Discharge Requirements General Order for Growers in the Grassland Drainage Area, Order R5-2015-0095-07

Proposed for consideration at the 10 December 2026 Regional Board meeting. To be given full consideration, any comment or recommendation you may have must be submitted in writing to the Central Valley Regional Water Quality Control Board office no later than 5:00 pm on 2 December 2026. Questions or comments may be directed to Ashley Peters at (916) 464-4857 or by email at Ashley.Peters@waterboards.ca.gov.

San Luis & Delta-Mendota Water Authority and United States Department of the Interior Bureau of Reclamation – Amending Waste Discharge Requirements for Surface Water Discharges from Grassland Bypass Project, Order R5-2019-0077

Proposed for consideration at the 10 December 2026 Regional Board meeting. To be given full consideration, any comment or recommendation you may have must be submitted in writing to the Central Valley Regional Water Quality Control Board office no later than 5:00 pm on 2 December 2026. Questions or comments may be directed to Ashley Peters at (916) 464-4857 or by email at Ashley.Peters@waterboards.ca.gov.


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